On Sunday, April 21, 2019, 5:47:22 PM MDT, Gene Heskett <[email protected]> wrote: > On Sunday 21 April 2019 14:51:31 Bruce Layne wrote: > >> I don't need to use an impact wrench to tighten and loosen the drawbar >> to prevent TTS tooling from pulling out. Something isn't right there, >> Gene. Maybe some of the grease you're using on the drawbar threads >> made its way into the 3/4" interior of the modified R8 collet? > Possible, but whats this about a "modified R8 collet"?
Here's the Tormach TTS modified R8 collet. If you're not using this, you probably aren't really using the Tormach Tooling System, and that may be your problem with TTS pull out. https://www.tormach.com/store/index.php?app=ecom&ns=prodshow&ref=35356 The TTS tool holders are pulled up by the modified R8 collet and the top of the TTS tool holder has a flat ring that is pulled tightly against the bottom of the spindle nose. This is sort of the TTS magic. If the nose of your spindle is bunged up or is uneven from being cheaply manufactured or from a crash, you should tram your mill to get the spindle axis orthogonal to the table and then mount a carbide cutter to the table and lower the spindle to machine the nose of the spindle flat and perpendicular to the spindle axis so the TTS tool holders have a flat mating surface. I wouldn't recommend TTS for professional shops with big machines, but for the home gamers with spindles of up to 2HP or maybe 3HP, I think TTS is a very good low cost solution. A great deal of engineering has been done to create tool holding for professionals and I'm grateful that Tormach created TTS for the rest of us. It's a quick and easy way for me to keep the tools I use the most loaded and ready to go, with a quick change that retains the Z axis offset. Get the official TTS tooling from Tormach with the annular ring and it's even compatible with their automatic tool changer. One of these days, after I automate the tool change operation, I might get around to making my own mini ATC with a cheesy tool tray that holds 6-8 TTS tool holders on the left side of the table and simply index over, drop a tool in a spring loaded pocket, verify the tool has been unloaded, then go over and grab another tool from a different pocket. It wouldn't allow me to load all the tools I commonly use (that's what my big TTS tool rack is for), but I could load the few tools needed for a job into the mini-ATC tool tray. _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
